Maintenance and Field Replacement

 

The following topics are covered in this section:

This appendix describes the process for replacing switch components. You must ensure that at least one of the secondary grounding pads located on the front panel of the chassis is connected to the data center ground. While working on the switches, use grounded, anti-static wrist straps connected to one of the attach points on the switch for grounding yourself and preventing ESD damage to the switch.

 

Note: Illustrations in this appendix are examples for a representative switch and component(s). Procedures must be applied to component(s) supported by the specific device. You must use component(s) and the appropriate slots for those component(s) when replacing or adding them.

 

Power Supplies

The switches support AC Power supplies which must be ordered separately. The following steps are required for ESD protection when adding or replacing power supplies.

 

Note: For the exact locations of power supplies and grounding for your device, refer to Front Panel and Rear Panel.

 

  1. Ensure that the switch is grounded.
    Connect at least one of the chassis grounding pads located on the front and rear panels of the chassis to the data center ground as needed.
  2. Ground yourself using a connected, anti-static wrist strap.
    The anti-static ESD wrist strap must be connected to one of the attach points on the switch.
  3. Remove the power supply to be replaced (Removing AC Power Supply) or use an empty slot.
    Note: For the power supplies supported by your device, refer to Table 2. If the PSU has a cable release latch, use it for securing and removing the power cord as needed.

     

Removing AC Power Supply

Perform the following steps to remove an AC power supply.
  1. Put on a grounded, anti-static ESD strap.
  2. Unplug the cable from the PSU.
  3. Squeeze the latch release.
  4. Remove the power supply from the switch using the power supply latch release and handle.

Installing AC Power Supply

You must make space for installing the power supply by removing an existing one (Removing AC Power Supply) or use an available slot on the switch. Perform the following steps to install an AC power supply.
  1. Put on a grounded, anti-static ESD strap.
  2. Unpack the new power supply.
  3. Insert the new power supply into the empty power supply slot.
  4. After you insert the power supply, push gently on the power supply until the power supply is fully seated.
  5. Connect the power cord to the power supply.
  6. Connect to the power source.
  7. Verify normal operation using the LED indicators for your switch Table 3.

Fan Module

The fan modules are hot-swappable and N + 1 redundant. They are accessible from the rear of the switch (Rear Panel). You must take into account that the module you are inserting is compatible with the switch and the module that you are replacing. Perform the following steps to remove and replace a fan module.

Removing Fan Module

  1. Put on a grounded, anti-static ESD strap.
  2. Use the release lever to unseat the fan module.
  3. Use the handle to pull out the fan module.

Installing Fan Module

You must make space for installing the module by removing an existing one (Removing Fan Module) from a fan module slot available on the switch. Perform the following steps to install the module.
  1. Put on a grounded, anti-static ESD strap.
  2. Unpack the module to be installed.
  3. Slide the fan module into the slot until it is completely seated.
  4. Verify that the module is operating normally (Table 6).
  5. Use the show environment cooling command to further verify normal operation.

Supervisor Module

The supervisor modules are hot-swappable. They are accessible from the front of the switch. You must take into account that the module you are inserting is compatible with the switch and the module that you are replacing. Use the following procedure to remove and replace a supervisor module. For the supervisor module locations for your device, refer to Front Panel.

Removing Supervisor Module

Perform the following steps to remove the module.
  1. Put on a grounded ESD strap.
  2. Use the release handles on the Supervisor card to unseat it.
  3. Slide supervisor module out of the slot.

Removing Supervisor Module Blank

The supervisor module blank has plastic latches.
  1. Put on a grounded, anti-static ESD strap.
  2. Grip the plastic handles to release the latch and remove the blank from the supervisor module slot you are going to populate.

    You may want to save the blank for future use as needed. The blank is needed for the switch to operate normally if a supervisor module slot is not populated.

Installing Supervisor Module

You must make space for installing the module by removing an existing one (Removing Supervisor Module) or removing a blank (Removing Supervisor Module Blank) from a supervisor module slot available on the switch. Perform the following steps to install the module.
  1. Put on a grounded, anti-static ESD strap.
  2. Unpack the supervisor module to be installed.
  3. Slide supervisor module into slot until it is completely seated.
  4. Verify that the module is operating normally (Table 1).

Linecards

The linecards are hot-swappable. They are accessible from the front of the switch. You must take into account that the linecard you are inserting is compatible with the switch and the linecard that you are replacing. Use the following procedure to remove and replace a linecard. If you are adding a new linecard, remove the blank from the linecard slot and install the new linecard. For the linecard locations on your switch, refer to Front Panel. Figure 1 shows linecards with the seating or ejector mechanisms along with some fully seated linecards.

Figure 1. CCS-75x Linecard Install

1 Linecard 3 Ejector lever (linecard seated correctly)
2 Ejector mechanism (lever and handle) 4 Ejector lever (linecard not seated)

 

Removing a Linecard

Perform the following steps to remove a linecard.
  1. Put on a grounded, anti-static ESD strap.
  2. Move the left and right handle outwards until the ejector lever releases the linecard.
  3. Slide the linecard out using care as the linecard could be heavy.

Removing Linecard Blank

The linecard blank has plastic latches.
  1. Put on a grounded, anti-static ESD strap.
  2. Grip the plastic handles to release the latch and remove the blank from the linecard slot you are going to populate.

    You may want to save the blank for future use as needed. The blank is needed for the switch to operate normally if a linecard slot is not populated.

Installing a Linecard

You must make space for installing the linecard by removing an existing one (Removing Linecard) or removing a blank (Removing Linecard Blank) from a linecard slot available on the switch.
  1. Put on a grounded, anti-static ESD strap.
  2. Unpack the linecard to be installed.
  3. Slide the linecard into the slot until the ejection lever goes inside the chassis and push gently until the linecard is seated completely.
  4. Verify that the linecard is operating normally (Table 4).
    Note: The ejector handle is perpendicular to the face when correctly installed.

Switchcards

The switchcards are hot-swappable and 1 + 1 redundant. They are accessible from the rear of the switch (Rear Panel). You must take into account that the switchcard you are inserting is compatible with the switch and the switchcard that you are replacing. Use the following procedure to remove and replace a switchcard. For the switchcard locations on your switch, refer to Rear Panel.

Removing Switchcard

Perform the following steps to remove a switchcard.
  1. Put on a grounded, anti-static ESD strap.
  2. Use the release handles of the switchcard to unseat it.
  3. Pull the switchcard out gently once released.

     

    Note: When the switchcard and fan assembly is removed, a metal cover swings into place (Figure 2).

     

    Figure 2. 758 Rear View with One Switchcard Installed

    1 SC2 cover

     

Installing Switchcard

You must make space for installing the switchcard by removing an existing one from a switchcard slot available on the switch unless an open slot is available.
  1. Put on a grounded, anti-static ESD strap.
  2. Unpack the switchcard to be installed.
  3. Slide the switchcard into the slot until it is completely seated.
  4. Verify that the switchcard is operating normally (Table 5).

    Figure 3 shows switchcard installation. The switchcard on the right is fully seated with the latch closed.

    Figure 3. 758 Switchcard Installation

    1 Switchcard 3 Ejector (switchcard not seated)
    2 Ejector mechanism (handle and latch) 4 Ejector latch (closed)